diff --git a/Images/ResetInterpolateSyncLines.png b/Images/ResetInterpolateSyncLines.png
new file mode 100644
index 0000000..4ca59f2
Binary files /dev/null and b/Images/ResetInterpolateSyncLines.png differ
diff --git a/InterpolateSyncLines.lua b/InterpolateSyncLines.lua
index decbccb..a58ba9a 100644
--- a/InterpolateSyncLines.lua
+++ b/InterpolateSyncLines.lua
@@ -65,7 +65,7 @@ end
 local nFirstId = GDB_ID.NULL
 local nCount = 0
 bOk, nFirstId, nCount = EgtTrimmingInterpolateSyncLines( nLayerEditId, nFirstSync, nSecondSync, vnBzCrvId[1], vnBzCrvId[2], dEdgeLinTol, dEdgeAngTol)
-if not bOk or nFirstId == GDB_ID.NULL or nCount == 0 then
+if not bOk then
    EgtOutBox( ERROR_EDIT_SYNC_CURVES .. 'Invalid Interpolation', 'Error', 'ERROR', 'OK')
    return
 end
@@ -73,9 +73,15 @@ end
 -- Cambio il colore alle due Linee di Sincronizzaione selezionate e alle nuove calcolate
 EgtSetColor( nFirstSync, SYNC_LINE_INTERP_COLOR)
 EgtSetColor( nSecondSync, SYNC_LINE_INTERP_COLOR)
-for i = 0, nCount do
-   EgtSetColor( nFirstId + i, SYNC_LINE_INTERP_COLOR)
-   EgtSetName( nFirstId + i, SYNC_LINE_NAME)
+if nFirstId ~= GDB_ID.NULL and nCount > 0 then
+   local vNewIds = {}
+   for i = 0, nCount do
+      EgtSetColor( nFirstId + i, SYNC_LINE_INTERP_COLOR)
+      EgtSetName( nFirstId + i, SYNC_LINE_NAME)
+      table.insert( vNewIds, nFirstId + i)
+   end
+  -- Memorizzo gli Id delle curve inserite
+   EgtSetInfo( nLayerEditId, KEY_SYNC_LINES_INTERPOLATION_IDS, vNewIds)
 end
 
 -- Metto il Focus sul Layer di Sincronizzazione delle curve
diff --git a/ResetInterpolateSyncLines.lua b/ResetInterpolateSyncLines.lua
new file mode 100644
index 0000000..c0c6a44
--- /dev/null
+++ b/ResetInterpolateSyncLines.lua
@@ -0,0 +1,41 @@
+-- ResetInterpSyncLines.lua by Egalware s.r.l. 2026/02/23
+
+require( 'EgtBase')
+_ENV = EgtProtectGlobal()
+EgtEnableDebug( false)
+
+-- Carico le costanti di Trimming
+EgtAddToPackagePath( EgtGetSourceDir() .. '?.lua')
+local GlobVar = require( 'TrimmingLib')
+-- Costante di Errore
+local ERROR_EDIT_SYNC_CURVES = 'Error in Edit Sync Curves : '
+
+-- Recupero il Part e Layer di Trimming corrente
+local nCurrPartId = EgtGetCurrPart()
+local nCurrLayerId = EgtGetCurrLayer()
+local nTrimmingLayer = GlobVar.GetTrimmingLayerRefId( nCurrLayerId)
+if not nTrimmingLayer or nTrimmingLayer == GDB_ID.NULL then
+   EgtOutBox( ERROR_EDIT_SYNC_CURVES .. 'Not a valid Trimming Layer', 'Error', 'ERROR', 'OK')
+   return
+end
+
+-- Recupero il Layer di Edit
+local nLayerEditId = GlobVar.GetCurrentEditSyncCurvesLayer( nCurrPartId, nTrimmingLayer)
+if ( not nLayerEditId or nLayerEditId == GDB_ID.NULL) then
+   EgtOutBox( ERROR_EDIT_SYNC_CURVES .. 'Not a valid Edit mode created', 'Error', 'ERROR', 'OK')
+   return
+end
+
+-- Chiedo all'Utente la conferma dell'operazione
+local bRemove = EgtOutBox( 'Do you want to remove the last Interpolated Sync Lines ?', 'Deleting', 'QUESTION', 'YESNO')
+if not bRemove then return end
+
+-- Recupero le ultime Linee di Sincronizzazione aggiunte e le elimino
+local vLastSurfIds = EgtGetInfo( nLayerEditId, KEY_SYNC_LINES_INTERPOLATION_IDS, 'vi')
+if vLastSurfIds ~= nil and #vLastSurfIds ~= 0 then EgtErase( vLastSurfIds) end
+
+-- Metto il focus sul Layer di Edit delle curve di Sincronizzazione
+EgtSetCurrPartLayer( nCurrPartId, nLayerEditId)
+
+-- Aggiorno la grafica
+EgtDraw()
diff --git a/ResetSelect.lua b/ResetSelect.lua
index 5eb45ce..e5f271a 100644
--- a/ResetSelect.lua
+++ b/ResetSelect.lua
@@ -45,7 +45,7 @@ EgtErase( vIdToErase)
 
 -- Se Esiste un Layer di Edit o di Stored, lo Rimuovo
 -- [NB. La DeSelezione cancella tutti i risultati fatti fino ad adesso]
-local nLayerSynEditId = GlobVar.GetCurrentEditSyncCurvesLayer( nCurrPartId, nCurrLayerId)
+local nLayerSynEditId = GlobVar.GetCurrentEditSyncCurvesLayer( nCurrPartId, nTrimmingLayer)
 if nLayerSynEditId ~= nil and nLayerSynEditId ~= GDB_ID.NULL then EgtErase( nLayerEditId) end
 
 -- Recupero l'ultima(le ultime) Supercicie(i) aggiunta(e) e la(e) elimino
diff --git a/Settings.lua b/Settings.lua
index b56c9a7..cd1a037 100644
--- a/Settings.lua
+++ b/Settings.lua
@@ -19,11 +19,11 @@ if not sFileIni then
 end
 
 -- Recupero i Colori in Hex come stringhe
-local sHexSurfSelColor = GlobVar.GetColorFromRGBToHex( SELECTION_SURF_COLOR)
-local sHexEdgeColor = GlobVar.GetColorFromRGBToHex( EDGES_COLOR)
-local sHexSyncLinesColor = GlobVar.GetColorFromRGBToHex( SYNC_LINE_COLOR)
-local sHexSyncInterpLinesColor = GlobVar.GetColorFromRGBToHex( SYNC_LINE_INTERP_COLOR)
-local sHexRuledBzColor = GlobVar.GetColorFromRGBToHex( RULED_BZ_COLOR)
+local sHexSurfSelColor = GlobVar.GetStringFromColor( SELECTION_SURF_COLOR)
+local sHexEdgeColor = GlobVar.GetStringFromColor( EDGES_COLOR)
+local sHexSyncLinesColor = GlobVar.GetStringFromColor( SYNC_LINE_COLOR)
+local sHexSyncInterpLinesColor = GlobVar.GetStringFromColor( SYNC_LINE_INTERP_COLOR)
+local sHexRuledBzColor = GlobVar.GetStringFromColor( RULED_BZ_COLOR)
 if not sHexSurfSelColor or not sHexEdgeColor or not sHexSyncLinesColor or not sHexSyncInterpLinesColor or not sHexRuledBzColor then
    EgtOutBox( ERROR_SETTINGS .. 'Error in Converting Colors', 'Error', 'ERROR', 'OK')
    return
@@ -38,11 +38,11 @@ local vsVal = EgtDialogBox( 'Settings', { 'Surf Selection','CP:'.. sHexSurfSelCo
 if not vsVal or #vsVal ~= 5 then return end
 
 -- Memorizzo i nuovi colori per le variabili
-local SelSurfCol = GlobVar.GetColorFromHexToRGB( vsVal[1])
-local EdgeColor = GlobVar.GetColorFromHexToRGB( vsVal[2])
-local SyncLineColor = GlobVar.GetColorFromHexToRGB( vsVal[3])
-local SyncInterpLinesColor = GlobVar.GetColorFromHexToRGB( vsVal[4])
-local RuledBZColor = GlobVar.GetColorFromHexToRGB( vsVal[5])
+local SelSurfCol = GlobVar.GetColorFromString( vsVal[1])
+local EdgeColor = GlobVar.GetColorFromString( vsVal[2])
+local SyncLineColor = GlobVar.GetColorFromString( vsVal[3])
+local SyncInterpLinesColor = GlobVar.GetColorFromString( vsVal[4])
+local RuledBZColor = GlobVar.GetColorFromString( vsVal[5])
 if not SelSurfCol or not EdgeColor or not SyncLineColor or not SyncInterpLinesColor or not RuledBZColor then
    EgtOutBox( ERROR_SETTINGS .. 'Error in Converting Colors', 'Error', 'ERROR', 'OK')
    return
diff --git a/Trimming.ini b/Trimming.ini
index 42c7cac..7444053 100644
--- a/Trimming.ini
+++ b/Trimming.ini
@@ -1,28 +1,29 @@
 [Trimming]
 TrimEnable=1
-SurfSelectionColor=255,255,185
+SurfSelectionColor=255,255,179
 EdgesColor=0,128,255
 SyncLineColor=0,255,0
-SyncLineInterpColor=255,165,0
-RuledBzColor=37,37,37
+SyncLineInterpColor=255,43,149
+RuledBzColor=81,162,162
 BaseDir=C:\EgtData\Trimming
-Button1=Settings.lua,Images\Settings.png,Settings
-Button2=Separator
-Button3=NewTrimming.lua,Images\NewTrimming.png,New Trimming
-Button4=DeleteTrimming.lua,Images\DeleteTrimming.png, Delete Trimming
-Button5=Separator
-Button6=Select.lua,Images\Select.png,Select
-Button7=SelectHoles.lua,Images\SelectHoles.png,Select Holes
-Button8=ResetSelect.lua,Images\ResetSelect.png, <-- Undo,
-Button9=Separator
-Button10=CalcBezierEdges.lua,Images\BezierEdges.png,Get Borders
-Button11=EditBezierBorders.lua,Images\EditBezierEdges.png,Edit Curves
-Button12=ResetEditBezierBorders.lua,Images\ResetEditBezierEdges.png,<-- Undo
-Button13=EndEditBezierBorders.lua,Images\EndEditBezierEdges.png,Ok
-Button14=Separator
-Button15=EditSyncLines.lua,Images\EditSyncLines.png,Edit SyncLines
-Button16=InterpolateSyncLines.lua,Images\InterpolateSyncLines.png,Interpolate SyncLines
-Button17=ResetSyncLines.lua,Images\ResetSyncLines.png,Reset SyncLines
-Button18=Separator
-Button19=CalcBezier.lua,Images\BezierSurf.png,Get Surf
-Button20=ResetBezierSurf.lua,Images\ResetBezierSurf.png,<-- Undo
\ No newline at end of file
+Button1=NewTrimming.lua,Images\NewTrimming.png,New Trimming
+Button2=DeleteTrimming.lua,Images\DeleteTrimming.png, Delete Trimming
+Button3=Separator
+Button4=Select.lua,Images\Select.png,Select
+Button5=SelectHoles.lua,Images\SelectHoles.png,Select Holes
+Button6=ResetSelect.lua,Images\ResetSelect.png, <-- Undo,
+Button7=Separator
+Button8=CalcBezierEdges.lua,Images\BezierEdges.png,Get Borders
+Button9=EditBezierBorders.lua,Images\EditBezierEdges.png,Edit Curves
+Button10=ResetEditBezierBorders.lua,Images\ResetEditBezierEdges.png,<-- Undo
+Button11=EndEditBezierBorders.lua,Images\EndEditBezierEdges.png,Ok
+Button12=Separator
+Button13=EditSyncLines.lua,Images\EditSyncLines.png,Edit SyncLines
+Button14=InterpolateSyncLines.lua,Images\InterpolateSyncLines.png,Interpolate SyncLines
+Button15=ResetInterpolateSyncLines.lua,Images\ResetInterpolateSyncLines.png,<-- Undo
+Button16=ResetSyncLines.lua,Images\ResetSyncLines.png,Reset SyncLines
+Button17=Separator
+Button18=CalcBezier.lua,Images\BezierSurf.png,Get Surf
+Button19=ResetBezierSurf.lua,Images\ResetBezierSurf.png,<-- Undo
+Button20=Separator
+Button21=Settings.lua,Images\Settings.png,Settings
\ No newline at end of file
diff --git a/TrimmingLib.lua b/TrimmingLib.lua
index f3d4dd2..41a23c0 100644
--- a/TrimmingLib.lua
+++ b/TrimmingLib.lua
@@ -25,6 +25,7 @@ KEY_AUTO_TRIMMING = 'AutoTrim'                           -- AutoTrimming
 KEY_SYNC_LINES_NUMBER = 'SkimmingFactor'                 -- Skimming Sync Lines
 KEY_SYNC_LINES_SHOW_ON_CORNERS = 'SyncLineShowOnCorners' -- Skimming Sync Lines Show on Corners
 KEY_SYNC_LINES_NUMBER_ANG_TOL = 'SkimmingFactorAngTol'   -- Skimming Sync Lines Tol
+KEY_SYNC_LINES_INTERPOLATION_IDS = 'SyncLineInterIds'    -- Skinning Sync Lines Interpolation Ids
 
 -- Chive per Tipologia di Layer
 KEY_LAYER_TYPE = 'Trimming_Layer_Type'
@@ -265,6 +266,37 @@ function TrimmingVar.GetCurrentEditSyncCurvesLayer( nPartId, nTrimmingLayerId)
    return GDB_ID.NULL
 end
 
+--======================== Colori ========================
+
+-- Funzione che recupera il colore da una stringa "nR,nG,nB" [0-255],[0-255],[0-255]
+function TrimmingVar.GetColorFromString( sColor)
+   local sVal = EgtSplitString( sColor)
+   if not sVal then return nil end
+   if #sVal ~= 3 then return nil end
+   local nRed = tonumber( sVal[1])
+   local nGreen = tonumber( sVal[2])
+   local nBlue = tonumber( sVal[3])
+   if not nRed or not nGreen or not nBlue then return nil end
+   if 0 <= nRed and nRed <= 255 and 0 <= nGreen and nGreen <= 255 and 0 <= nBlue and nBlue <= 255 then
+      return Color3d( nRed, nGreen, nBlue)
+   end
+   return nil
+end
+
+-----------------------------------------------------------------------------
+-- Funzione per convertire un Color3d ad una stringa "nR,nG,nB" [0-255],[0-255],[0-255]
+function TrimmingVar.GetStringFromColor( myColor)
+   if not myColor then return nil end
+   return ( "".. myColor:getRed().. ",".. myColor:getGreen().. ",".. myColor:getBlue())
+end
+
+-----------------------------------------------------------------------------
+-- Funzione per convertire Colori da Classe3d a stringa per File.ini
+function TrimmingVar.GetColorForIniFile( myColor)
+   if not myColor then return nil end
+   return ( myColor:getRed().. ",".. myColor:getGreen().. ",".. myColor:getBlue())
+end
+
 --======================== Utility =======================
 
 -----------------------------------------------------------------------------
@@ -300,47 +332,6 @@ function TrimmingVar.GetGlobBox( vIds)
    return BBox3dGlob
 end
 
--------------------------------------------------------------------------------
--- Funzione che recupera il colore da una stringa "nR,nG,nB" [0-255],[0-255],[0-255]
-function TrimmingVar.GetColorFromString( sColor)
-   local sVal = EgtSplitString( sColor)
-   if not sVal then return nil end
-   if #sVal ~= 3 then return nil end
-   local nRed = tonumber( sVal[1])
-   local nGreen = tonumber( sVal[2])
-   local nBlue = tonumber( sVal[3])
-   if not nRed or not nGreen or not nBlue then return nil end
-   if 0 <= nRed and nRed <= 255 and 0 <= nGreen and nGreen <= 255 and 0 <= nBlue and nBlue <= 255 then
-      return Color3d( nRed, nGreen, nBlue)
-   end
-   return nil
-end
-
--- Conversione Colori da Hex -> Color3d
-function TrimmingVar.GetColorFromHexToRGB( sHex)
-   if not sHex then return nil end
-  -- Rimozione eventuale "#" iniziale
-   sHex = sHex:gsub( "#", "")
-  -- Estraggo le Coppie
-   local nR, nG, nB = sHex:match( "(%x%x)(%x%x)(%x%x)")
-  -- Restituisco il risultato
-   return Color3d( tonumber( nR, 16), tonumber( nG, 16), tonumber( nB, 16))
-end
-
--- Conversione Colori da classe Color3d a Hex
-function TrimmingVar.GetColorFromRGBToHex( myColor)
-   if not myColor then return nil end
-   return ( string.format("%02X", myColor:getRed()) ..
-            string.format("%02X", myColor:getGreen()) ..
-            string.format("%02X", myColor:getBlue()))
-end
-
--- Conversione Colori da Classe3d a stringa per File.ini
-function TrimmingVar.GetColorForIniFile( myColor)
-   if not myColor then return nil end
-   return ( myColor:getRed().. ",".. myColor:getGreen().. ",".. myColor:getBlue())
-end
-
 -- Inizializzazione per lettura delle variabili
 if not TrimmingVar.bInit then
    local sFileIni = EgtGetIniFile()
diff --git a/Version.lua b/Version.lua
index 6e9b97e..8a3bad1 100644
--- a/Version.lua
+++ b/Version.lua
@@ -2,5 +2,5 @@
 -- Gestione della versione di Trimming dei Termoformati
 
 NAME = 'Trimming'
-VERSION = '3.1a7'
-MIN_EXE = '3.1a7'
+VERSION = '3.1b1'
+MIN_EXE = '3.1b1'